SU1674206A2 - Signal transmitter - Google Patents

Abstract

The invention relates to automation and telemechanics and can be used to monitor the state of a large number of dispersed objects. The purpose of the invention is to increase the reliability of the device. The device contains signaling units, each of which consists of a thyristor and six diodes, four thyristor optocouplers, three sensors, a capacitor and seven resistors. Sensors contain closing and opening keys. The device makes it possible to increase the reliability of the monitoring system by improving diagnostic tools, reducing the time and laboriousness of searching for damage. 1 il.

Description

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The invention relates to automation and telemechanics and can be used to monitor the state of a large number of dispersed objects and is additional to the author. St. No. 1401499.

The purpose of the invention is to increase the reliability of the device.

The drawing shows the electrical circuit of the device.

The device contains 1 signaling units, each of which consists of a thyristor 2, six diodes 3-8, four thyristor optocouplers 9-12. three sensors 13-15, a capacitor 16 and seven resistors 17-23, a first 24 and a second 25 power supply lines of the device, informational communication lines 26-28 of the device, a communication line 29 of the device. Sensor 13 (14 and 15) contains closing and opening switches 301 and 302

The device works as follows.

The device is controlled by the first 24 and second 25 power lines, to which the dc voltage-promoting clock pulses are successively received over time, while the polarity of the voltage in the power lines changes in each successive clock pulse.

For storing the on state of the corresponding alarm unit 1 (shown on the left), a capacitor 16 of the next alarm unit (shown on the right) is used, which during the pause between clock pulses maintains current through the control electrode of the thyristor 2

If there is a positive potential in the first supply line 24 and the current in the circuit

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the control electrode of the thyristor 2, the latter opens. The anode current of this thyristor flows through the link 29, the diode 4 resistor 1, the control electrode of the thyristor 2 and the diode 3 of the next signaling unit to the second power line 25, which at this time has a negative potential. In this case, the capacitor 16 is charged, and the thyristor 2 of the next signaling unit 1 is prepared for switching on. When a positive potential appears in the second power line 25, the thyristor of the corresponding signaling unit 1 is turned on and prepared for switching on the thyristor of the next signaling unit 1. The anode current of each thyristor 2 flows through successively connected in the forward direction emitting diodes of optocouplers 9-12, resistor 19 and diode 8. In this case, the emitting diode will excite the photothyristor of the optocoupler, which acquires conductive properties.

When switching power lines, the switched on state of the thyristors and the selective flow of current through separately connected circuits consisting of diodes 5-7 and the closing key of the 3d sensors 13-15.

The communication lines 29 between adjacent signaling units 1 provide for the passage of the preparation command for switching on the corresponding election cell, and the information communication lines 26-28 serve for transmitting signals from the monitored sensors to the receiving half (not shown).

Let the thyristor 2 of this corresponding unit 1 be turned on at the given time. In the case of the closed state of the sensor closing keys 30i, the voltage and current from the output of the thyristor 2 are applied to the information lines 26-28, indicating the corresponding indication of the sensor state, which can be further reflected in the control and display system. In the next moment of time, as a result of switching, thyristor 2 of the next signaling unit 1 will turn on and the status of its sensors 13-15 will be monitored.

There are no distortions of transmitted signals in the device due to any repeated damage to the electrical circuits of the sensors. In some cases, distortions are eliminated, in others a protective failure occurs.

Suppose that, as a result of the damage, the point a and point c were connected to the ground in alarm unit 1. In this case, the signals are not distorted, since if the closing key is closed, the information is reliable, if the closing

the key is open, either a protective failure or distortion protection occurs, because the disturbance, having appeared at point b in the form of a positive potential, will flow through the open thyristor of the optocoupler 12 into the power line 25, on which there is currently a negative potential.

The device makes it possible to increase the reliability of the monitoring system by improving the diagnostic properties, reducing the time and complexity of the search for damage.

Claims (1)

Claims An apparatus for transmitting signals by aut. St. No. 1401499 is different that, in order to increase reliability, a disconnecting key has been inserted into each sensor of the alarm unit, the first terminal of which is connected to the second sensor contact, and the second terminal is the third contact a sensor, a seventh resistor and a fourth thyristor optocoupler are inserted into each alarm unit; the anode and cathode of its LED are connected between the cathode of the third thyristor optocoupler LED and the first output of the third resistor, respectively; the cathode of the sixth diode, respectively, parallel to the control electrode and the cathode of the photo thyristor of the fourth thyristor optocoupler is connected to the seventh resistor.